Flexible oil acid modified alkyd resin wrinkle coating composition and method of making



Patented June 12, 1951 UNITED STATES PATENT FLEXIBLE OIL ACID MODIFIEDALKYD RESIN WRINKLE COATING COMPOSI- TION AND METHOD OF MAKING OFFICE NoDrawing. Application March 12, 1946, Serial No. 653,934

4 Claims.

This invention relates to a coating composition which dries to a film ofhigh flexibility and of a wrinkled surface texture and to a process formanufacturing same.

The composition of my invention, on account ofiits yielding a film ofhigh flexibility, is excellently qualified for the coating of fabrics,leather, paper, rubber and of other flexible base materials.

added.

Aromatic solvents, such as petroleum or coal tar solvents are suitablefor the product of my invention. Alcohols, in particular butanol, arepreferable because of their high dissolving power.

By using these'stronger solvents, it ispossible to obtain a moreconcentrated solution of the coating composition which is desirable inthe case that the base material is to be coated by the doctor blademethod.

Various oil-soluble metallic driers known to those skilled in the artare satisfactory for the product and process of my invention, the naphthenates, acetates or linoleates of cobalt, manga- Heretofore non-dryingalkyd resin composil0 nese or lead being preferable. tions were heldincompatible with drying oils and The amount of thinner is dependentupon th also as yielding non-wrinkling coatings. Howmethod by which thecomposition is to be applied ever, against all expectations, it wasfound that onto the base material. It is understood that by includingfatty acid of a non-drying oil and any method, such as spraying,rolling, dipping or drying oil in the alkyd resin formulation and doctorblading is applicable for the composition reacting these ingredientsunder specific condiof my invention. tions, a composition is obtainedwhich, when Drying of the coating composition, after applidried orbaked, yields a coating of high flexibilcation on the base material, ispreferably carried ity and of a wrinkle texture. out by baking, thetemperature being dependent Consequently the object of my invention isto a certain degree upon the base material, and accomplished by reactingpolyhydric alcohol and in particular on its heat resistance. The higherpolybasic acid, fatty acid of anon-drying or the temperatures used forthis baking step, the semi-drying oil and drying oil at a temperatureshorter the time required therefor. A baking of from 425 to 525 F. andadding a metallic drier temperature of 200 F. for one hour or atemperaand a solvent to the mixture thus obtained. ture of 150 F. fortwo hours, for instance, proved Castor oil acids were found particularlysuitto be suflicient. able for the process and the product of my in- Theflexibility and the wrinkle texture are vention. However, other acidsderived from nondependent upon the quantity of oil added. The drying orsemi-drying oil may be used with equal more oil, the more pronounced thewrinkle tex- Satisfactionture and the less flexible the coatingobtained.

As the oil necessary, all drying oils were found A proportion of from 1to 1.5 parts by weight applicable, conjugated double-bonded drying oilsof drying oil to 1 part by weight of fatty oil being preferable.Heat-treated linseed oil, oitiacid was found to be the optimal range.cica oil, tung oil, dehydrated castor oil or a mix- In the following afew examples are given ture of these oils were used with good results.which demonstrate the composition and the In order to prepare thecomposition of my process of my invention. invention I first reactapproximately 15 parts by Example I weight of glycerin and from 15 toparts by weight of phthalic anhydride at a temperature of 15 parts byweight glycerin from 375 to 425 F. and then add from 10 to 30 40 30parts by weig t phthalic anhydride parts by weight of fatty acid to thisreaction 25.5 parts by Weight Castor Oil acids mixture. The mixture isthen heated to a tem- Parts y Weight liquid oiticica Oil perature offrom 425 to 475 F. until a homoge- 20 parts y Weight butanol neousproduct is obtained. Thereafter 15 to 30 5 Parts by Weight cobaltlinoleate 6% parts by weight of drying Oil are added a the 5 Thecomposition of this example was prepared batch heated to 475 to 525 F.until a clear hoby first heating the glycerin d phthalic anhymogenousliquid is obtained. The batch is then dride to approximatdy 00 F, thenadding the allowed to 0001 t0 a temperature sufliciently 10W astor oilacids and heating the mixture to apto v id v p r ion of solv n w nadded- An proximately 450 F. until the mixture was homooil-solublemetallic drier and solvent are then geneous; thereafter the oiticica oilwas added and then this mixture heated to approximately 525 F. until adrop applied on a glass plate proved to be clear. The mixture thusobtained was then allowed to cool to 200 F., whereupon the butanol andcobalt linoleate were admixed.

This composition, after applying on a base material and baking, showedWrinkle texture and initial flexibility equal to that of known productsand aging characteristics which showed this product still flexible aftermonths of exposure to atmospheric conditions.

Example II 15 parts by weight glycerin 30 parts by weight phthalicanhydride 255 parts by weight castor oil acids 24 parts by weight rawtung oil 10 parts by weight butanol 5 parts by weight cobalt linoleate6% A film obtained with this composition, which was prepared accordingto the method described in Example I, showed an alligator-grainedwrinkle texture of high flexibility.

Example III 15 parts by weight glycerin 30 parts by weight phthalicanhydride 25.5 parts by weight castor oil acids 24 parts by weightdehydrated castor oil 10 parts by weight butanol 5 parts by weightcobalt linoleate 6% The texture of the film showed a very uniformwrinkle pattern and the coating proved to be highly flexible.

Example IV parts by weight glycerin parts by weight phthalic anhydride25.5 parts by weight castor oil acids 24 parts by weight prepared oil 10parts by weight butanol 5 parts by weight cobalt linoleate 6% example,pigments or dyes may be added to the product of my invention.

It will also be understood that while there have been described hereincertain specific embodiments of my invention, it is not intended therebyto have it limited to or circumscribed by the specific details as tomaterials, proportions or conditions set forth, but that it is desiredto comprehend such modifications as may come within the spirit of thedisclosure and the scope of the appended claims.

I claim:

1. A method of preparing flexible wrinkle coating compositionscomprising reacting approximately 15 parts by weight of glycerin andfrom 15 to 40 parts by Weight of phthalic anhydride at a temperature offrom 375 to 425 R, adding from 10 to 30 parts by weight of an acidselected from group of semi-drying and non-drying fatty oil acids, andheating to a temperature of from 425 to 475 F. until homogeneous, addingfrom 15 to 30 parts by weight of a drying oil and heating to atemperature of from 475 to 525 F. until homogeneous, cooling the batchto approximately 200" and finally adding an oilsoluble metallic drierand a solvent.

2. A flexible wrinkle coating composition comprising the reactionproduct of approximately 15 parts by Weight of glycerin, from 15 to 40parts by weight of phthalic anhydride, from 10 to 30 parts by weight ofan acid selected from group of semi-drying and non-drying fatty oilacids, and from 15 to 30 parts by weight of drying oil; oil-solublemetallic drier; and solvent.

3. A method of preparing flexible wrinkle coating compositionscomprising reacting approximately 15 parts by weight of glycerin andfrom 15 to 40 parts by weight of phthalic anhydride at a temperature offrom 375 to 425 F., adding from 10 to 30 parts by weight of castor oilacids and heating to a temperature of from 425 to 475 F. untilhomogeneous, adding from 15 to 30 parts by weight of a drying oil andheating to a temperature of 475 to 525 F. until homogeneous, cooling thebatch to approximately 200 F. and finally adding an oil-soluble metallicdrier and a solvent.

4. A flexible wrinkle coating composition comprising the reactionproduct of approximately 15 parts by weight or" glycerin, from 15 to 40parts by weight of phthalic anhydride, from 10 to 30 parts by weight ofcastor oil acids and from 15 to 30 parts by weight of a drying oil;oil-soluble metallic drier; and solvent.

WILLIAM A. WALDIE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Moore Feb. 15, 1949

1. A METHOD OF PREPARING FLEXIBLE WRINKLE COATING COMPOSITIONSCOMPRISING REACTING APPROXIMATELY 15 PARTS BY WEIGHT OF GLYCERIN ANDFROM 15 TO 40 PARTS BY WEIGHT OF PHTHALIC ANHYDRIDE AT A TEMPERATURE OFFROM 375 TO 425* F., ADDING FROM 10 TO 30 PARTS BY WEIGHT OF AN ACIDSELECTED FROM THE GROUP OF SEMI-DRYING AND NON-DRYING FATTY OIL ACIDS,AND HEATING TO A TEMPERATURE OF FROM 425 TO 475* F. UNTIL HOMOGENEOUS,ADDING FROM 15 TO 30 PARTS BY WEIGHT OF A DRYING OIL AND HEATING TO ATEMPERATURE OF FROM 475* TO 525* F. UNTIL HOMOGENEOUS, COOLING THE BATCHTO APPROXIMATELY 200* F., AND FINALLY ADDING AN OILSOLUBLE METALLICDRIER AND A SOLVENT.